Report Summary

  • 54

    Performance

    Renders faster than
    72% of other websites

  • 88

    Accessibility

    Visual factors better than
    that of 69% of websites

  • 58

    Best Practices

    More advanced features
    available than in
    19% of websites

  • 71

    SEO

    Google-friendlier than
    30% of websites

library.sk

Vybrané katalógy používateľov Advanced Rapid Library

Page Load Speed

3.1 sec in total

First Response

629 ms

Resources Loaded

2.3 sec

Page Rendered

224 ms

library.sk screenshot

About Website

Visit library.sk now to see the best up-to-date Library content for Slovakia and also check out these interesting facts you probably never knew about library.sk

Vybrané katalógy používateľov Advanced Rapid Library

Visit library.sk

Key Findings

We analyzed Library.sk page load time and found that the first response time was 629 ms and then it took 2.5 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 45% of websites can load faster.

Performance Metrics

library.sk performance score

54

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value5.6 s

6/100

10%

LCP (Largest Contentful Paint)

Value8.3 s

2/100

25%

SI (Speed Index)

Value7.9 s

23/100

10%

TBT (Total Blocking Time)

Value40 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0.039

100/100

15%

TTI (Time to Interactive)

Value7.0 s

52/100

10%

Network Requests Diagram

library.sk

629 ms

uni.css

222 ms

global.css

229 ms

system.css

233 ms

fragdefault.css

232 ms

Our browser made a total of 77 requests to load all elements on the main page. We found that 13% of them (10 requests) were addressed to the original Library.sk, 45% (35 requests) were made to Cosmotron.cz and 13% (10 requests) were made to Static.xx.fbcdn.net. The less responsive or slowest element that took the longest time to load (738 ms) relates to the external source Cosmotron.sk.

Page Optimization Overview & Recommendations

Page size can be reduced by 159.6 kB (31%)

Content Size

507.9 kB

After Optimization

348.3 kB

In fact, the total size of Library.sk main page is 507.9 kB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 45% of websites need less resources to load. Images take 347.3 kB which makes up the majority of the site volume.

HTML Optimization

-82%

Potential reduce by 42.1 kB

  • Original 51.4 kB
  • After minification 48.6 kB
  • After compression 9.2 kB

HTML content can be minified and compressed by a website’s server. The most efficient way is to compress content using GZIP which reduces data amount travelling through the network between server and browser. HTML code on this page is well minified. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 42.1 kB or 82% of the original size.

Image Optimization

-13%

Potential reduce by 45.1 kB

  • Original 347.3 kB
  • After minification 302.2 kB

Image size optimization can help to speed up a website loading time. The chart above shows the difference between the size before and after optimization. Obviously, Library needs image optimization as it can save up to 45.1 kB or 13% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-60%

Potential reduce by 42.5 kB

  • Original 71.1 kB
  • After minification 53.8 kB
  • After compression 28.7 kB

It’s better to minify JavaScript in order to improve website performance. The diagram shows the current total size of all JavaScript files against the prospective JavaScript size after its minification and compression. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 42.5 kB or 60% of the original size.

CSS Optimization

-79%

Potential reduce by 30.0 kB

  • Original 38.1 kB
  • After minification 33.0 kB
  • After compression 8.1 kB

CSS files minification is very important to reduce a web page rendering time. The faster CSS files can load, the earlier a page can be rendered. Library.sk needs all CSS files to be minified and compressed as it can save up to 30.0 kB or 79% of the original size.

Requests Breakdown

Number of requests can be reduced by 40 (53%)

Requests Now

76

After Optimization

36

The browser has sent 76 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Library. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 21 to 1 for JavaScripts and from 12 to 1 for CSS and as a result speed up the page load time.

Accessibility Review

library.sk accessibility score

88

Accessibility Issues

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

Names and labels

These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

Form elements do not have associated labels

Best Practices

library.sk best practices score

58

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Issues were logged in the Issues panel in Chrome Devtools

SEO Factors

library.sk SEO score

71

Search Engine Optimization Advices

Crawling and Indexing

To appear in search results, crawlers need access to your app.

Impact

Issue

High

Links are not crawlable

Language and Encoding

  • Language Detected

    SK

  • Language Claimed

    SK

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Library.sk can be misinterpreted by Google and other search engines. Our service has detected that Slovak is used on the page, and it matches the claimed language. Our system also found out that Library.sk main page’s claimed encoding is utf-8. Use of this encoding format is the best practice as the main page visitors from all over the world won’t have any issues with symbol transcription.

Social Sharing Optimization

Open Graph data is detected on the main page of Library. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: